Author: Helen Foster
MDL-21250 capital letters removal and greylisted string removal
http://git.moodle.org/gw?p=moodle.git;a=commit;h=bbe6f6e1138bbe198fa906694c2dd8d811c1f62b
http://github.com/moodle/moodle/commit/bbe6f6e1138bbe198fa906694c2dd8d811c1f62b
+ 2.0 en [invalidactivityid,core_error]
+ 2.0 en [invalidformdata,core_error]
+ 2.0 en [unknowncourseidnumber,core_error]
- 2.0 en [younotteacher,core_error]